Feed mechanism foe saw mill caeeiages



(No Model.)

B. T. LEMM;

FEED MEGHANISM FOR SAW MILL GARRIAGES.

Q KIM- UNITED STATES PATENT OFFICE.

ELI T. LEMM, OF EAILPLEINE, ASSIGNOR, BY MESNE ASSIGNMENTS, OF ONE-HALF TO EDMUN D P. ARPIN, OF GRAND RAPIDS, IVIS.

FEED MECHANISM FOR SAW-MILL CARRIAGES.

SPECIFICATION forming part of Letters Patent No. 361,068, dated April 12, 1887.

Application filed August 31, 1856. Serial No. 312,295. (No model.)

To aZZ whom it may concern:

Be it known that I, ELI T. LEMM, of Ban Pleine, in the county of Portage, and in the State of Wisconsin, haveinvented certain new and useful Improvements in Steam Friction- Feed for Saw-Mill Carriages; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates to'a friction-feed for saw-mill carriages, and it consists in certain peculiarities of construction and combination of parts, as will be hereinafter described with 'reference to the accompanying drawings, in

which Figure 1 represents a side elevation of my invention in operative position, and Fig. 2 a plan view of the same.

Referring by letter to the drawings, A represents a track for a saw-mill carriage, B, the latter having motion imparted thereto by means of a rope, G, that winds and unwinds upon a spool, D, the latter being actuated by means of an ordinary gear, that consists of a central iron friction-pulley, E, eccentrically journaled in suitable bearings, and oppositelyarranged paper friction-pulleys F F of different diameters, all of said friction-pulleys being supported in a frame, G, beneath the carriagetrack.

The shaft H of the iron friction-pu1ley E is provided with an arm, H, and the latter'is connected by a rod, I, with an eccentric, J, that is journale'd in a bearing, J, secured to the floor of the mill. The journal K of this eccentric is provided with an arm, K, that has a series of perforations, a, to permit the adjustable connection therewith of a bifurcated yoke, L, by means of a suitable bolt, 6, said yoke having the ends of its bifurcations, a, united by a cross-head, M, that is fast on one end of the horizontal piston-rodM ofa steamcylinder, N, the latter being in position on the mill-floor. The piston-rod Mhas a bearing in a standard, 0, and the cross-head M is provided with a guide-rod, M, that has its hearing in another standard, 0.

On the piston-rod M, between the cross-head M and standard 0, is a spiral spring, 1?,while asimilar spring, 1?, is also placed upon this rod between a collar, d, fast thereon and said standard, these springs acting as cushions.

The steamcylinder N is provided with a I suitable valve, Q, that has a crankarm, R, 0p-

actuated toward the saws, said pulleys being held in engagement by the pressure of steam against the piston in the cylinder N. To reverse the movement just described, the lever S is operated to change the position of the valve Q, thereby cutting off the steam-pressure from one side of the piston and exerting it upon the other. By this change of the steampressure the piston'rod M is caused to actuate the yoke L in the same line of travel, and the latter, through the arm-connection K, operates the eccentric J, that is connected by the rod [with the arm H on the eccentric'allymounted shaft H, thereby causing the pulley E to be brought over against the one, F, and there held as long as may be necessary or desirable.

As before described, the springs P P actas cushions, thus preventing the piston from having too quick a stroke when the steam-pressure is changed from one position to another. These springs also serve as a means for actuatiugthe piston-rod a sufficient distance to bring the main friction-pulley away from either of the ones, F F,With which it may be in contact when steam is cut off from the cylinder, thereby stopping the movement of thecarriage.

By the construction above described I am enabled to quickly adjust and hold the main friction-pulley against either the feed or gig pulleys entirely by steam-pressure, a simple movement of the valve-lever being all that is necessary to accomplish this result, or to entirely stop the carriage at any time during its travel.

When the main pulley is operated by hand supplied by another the mill must necessarily stop working. My device is certain in its operation, and does away with the manual labor necessary in operating the frictiongear, and hence the mill can be continuously run with a saving in expense.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination, with a friction feed-gear having an eccentrically-journaled main pulley,

v rod provided with a cross-head that unites the bifurcations of the yoke, and spiral springs arranged on said rod, substantially as described, to cushion its stroke and impart motion thereto when the steam is cut off, substantially as and-for the purpose set forth.

3. The combination,with a friction feed-gear having its main pulley eccentric-shaft operatively connected to an auxiliary eccentric, of a bifurcated yoke secured to the latter eccentric, a steam-cylinder provided with a piston- 3 5 rod that has a cross-head uniting the bifurcations of the yoke and a guide-rod extension, suitable bearings for said rods, spiral springs arranged upon the former rod on opposite sides of its bearings, a suitable valve for the 40 steam-cylinder, and a lever for operating said valve, substantially as and for the purpose set forth.

4. The combination, with a friction feedgear, of asteam-aetuated piston-rod operatively con- 5 nected to the main pulley of said gear, and suitable springs oppositely arranged on said rod to cushion its stroke and impart a reverse motion thereto when steam is cut off from either side of the piston, as and for the pur- 5o pose set forth.

In testimony that I claim the foregoing I have hereunto set my hand, at Milwaukee, in the county of Milwaukee and State of \Visconsin, in the presence of two witnesses.

ELI 'r. LEMM.

Vitnesses:

, H. G. UNDERWOOD,

N. E. OLIPIIANT. 

